ShotSpotter (SSTI) 10-Q 6 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	SSTI
Entity Registrant Name	ShotSpotter, Inc.
Entity Central Index Key	0001351636
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity File Number	001-38107
Entity Incorporation, State Country Name	Delaware
Entity Tax Identification Number	470949915
Entity Address, Address Line One	7979 Gateway Blvd.
Entity Address, Address Line Two	Suite 210
Entity Address, City or Town	Newark
Entity Address, State or Province	California
Entity Address, Postal Zip Code	94560
City Area Code	510
Local Phone Number	794-3100
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		11,477,165

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 27,432	$ 10,218
Accounts receivable and unbilled revenue	8,967	15,267
Prepaid expenses and other current assets	2,202	1,527
Restricted cash		60
Total current assets	38,601	27,072
Property and equipment, net	16,834	16,504
Operating lease right-of-use asset	697
Goodwill	1,379	1,379
Intangible assets, net	237	242
Other assets	1,596	1,922
Total assets	59,344	47,119
Current liabilities
Accounts payable	1,099	1,307
Deferred revenue, short-term	21,988	23,102
Accrued expenses and other current liabilities	4,209	4,427
Total current liabilities	27,296	28,836
Deferred revenue, long-term	1,133	1,060
Other liabilities	467	76
Total liabilities	28,896	29,972
Stockholders' equity
Common stock	57	55
Additional paid-in capital	127,870	114,618
Accumulated deficit	(97,352)	(97,377)
Accumulated other comprehensive loss	(127)	(149)
Total stockholders' equity	30,448	17,147
Total liabilities and stockholders' equity	$ 59,344	$ 47,119

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 10,260	$ 8,927	$ 19,853	$ 15,834
Costs
Cost of revenues	4,277	3,589	8,281	6,897
Impairment of property and equipment		361		361
Total costs	4,277	3,950	8,281	7,258
Gross profit	5,983	4,977	11,572	8,576
Operating expenses
Sales and marketing	2,439	2,195	5,068	3,749
Research and development	1,374	1,255	2,668	2,491
General and administrative	1,880	1,824	3,866	3,852
Total operating expenses	5,693	5,274	11,602	10,092
Operating income (loss)	290	(297)	(30)	(1,516)
Other income (expense), net
Interest income, net	171	22	204	49
Other expense, net	(52)	(76)	(109)	(75)
Total other income (expense), net	119	(54)	95	(26)
Income (loss) before income taxes	409	(351)	65	(1,542)
Provision for income taxes	22	18	40	44
Net income (loss)	$ 387	$ (369)	$ 25	$ (1,586)
Net income (loss) per share, basic	$ 0.03	$ (0.03)	$ 0	$ (0.15)
Net income (loss) per share, diluted	$ 0.03	$ (0.03)	$ 0	$ (0.15)
Weighted average shares used in computing net income (loss) per share, basic	11,365,472	10,589,038	11,186,371	10,329,874
Weighted average shares used in computing net income (loss) per share, diluted	11,973,476	10,589,038	11,857,346	10,329,874

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 387	$ (369)	$ 25	$ (1,586)
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net	35	(133)	23	(104)
Comprehensive income (loss)	$ 422	$ (502)	$ 48	$ (1,690)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017	$ 12,162	$ 48	$ 109,708	$ (97,595)	$ 1
Beginning balance, Shares at Dec. 31, 2017		9,827,129
Exercise of stock options	343	$ 3	340
Exercise of stock options, Shares		486,588
Issuance of common stock in connection with exercise of warrants, shares		16,129
Stock-based compensation	427		427
Other comprehensive income (loss)	29				29
Cumulative effect of change in accounting principle	3,025			3,025
Net income (loss)	(1,217)			(1,217)
Ending balance at Mar. 31, 2018	14,769	$ 51	110,475	(95,787)	30
Ending balance, Shares at Mar. 31, 2018		10,329,846
Beginning balance at Dec. 31, 2017	12,162	$ 48	109,708	(97,595)	1
Beginning balance, Shares at Dec. 31, 2017		9,827,129
Net income (loss)	(1,586)
Ending balance at Jun. 30, 2018	16,433	$ 53	112,639	(96,156)	(103)
Ending balance, Shares at Jun. 30, 2018		10,759,719
Beginning balance at Mar. 31, 2018	14,769	$ 51	110,475	(95,787)	30
Beginning balance, Shares at Mar. 31, 2018		10,329,846
Exercise of stock options	108		108
Exercise of stock options, Shares		66,628
Issuance of common stock in connection with exercise of warrants	989	$ 1	988
Issuance of common stock in connection with exercise of warrants, shares		272,309
Issuance of common stock from ESPP purchase	421	$ 1	420
Issuance of common stock from ESPP purchase, Shares		43,624
Issuance of common stock from RSUs vested, shares		47,312
Stock-based compensation	648		648
Other comprehensive income (loss)	(133)				(133)
Net income (loss)	(369)			(369)
Ending balance at Jun. 30, 2018	16,433	$ 53	112,639	(96,156)	(103)
Ending balance, Shares at Jun. 30, 2018		10,759,719
Beginning balance at Dec. 31, 2018	17,147	$ 55	114,618	(97,377)	(149)
Beginning balance, Shares at Dec. 31, 2018		10,864,722
Exercise of stock options	219	$ 1	218
Exercise of stock options, Shares		177,408
Issuance of common stock upon secondary offering, net of costs	10,554	$ 1	10,553
Issuance of common stock upon secondary offering net of costs, Shares		250,000
Issuance of common stock from RSUs vested, shares		28,790
Stock-based compensation	754		754
Other comprehensive income (loss)	(13)				(13)
Net income (loss)	(362)			(362)
Ending balance at Mar. 31, 2019	28,299	$ 57	126,143	(97,739)	(162)
Ending balance, Shares at Mar. 31, 2019		11,320,920
Beginning balance at Dec. 31, 2018	17,147	$ 55	114,618	(97,377)	(149)
Beginning balance, Shares at Dec. 31, 2018		10,864,722
Net income (loss)	25
Ending balance at Jun. 30, 2019	30,448	$ 57	127,870	(97,352)	(127)
Ending balance, Shares at Jun. 30, 2019		11,476,685
Beginning balance at Mar. 31, 2019	28,299	$ 57	126,143	(97,739)	(162)
Beginning balance, Shares at Mar. 31, 2019		11,320,920
Exercise of stock options	129		129
Exercise of stock options, Shares		65,960
Issuance of common stock in connection with exercise of warrants	51		51
Issuance of common stock in connection with exercise of warrants, shares		12,225
Issuance of common stock from ESPP purchase	642		642
Issuance of common stock from ESPP purchase, Shares		53,508
Issuance of common stock from RSUs vested, shares		24,072
Stock-based compensation	905		905
Other comprehensive income (loss)	35				35
Net income (loss)	387			387
Ending balance at Jun. 30, 2019	$ 30,448	$ 57	$ 127,870	$ (97,352)	$ (127)
Ending balance, Shares at Jun. 30, 2019		11,476,685

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 25	$ (1,586)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,402	1,775
Impairment of property and equipment		361
Stock-based compensation	1,659	1,075
Changes in operating assets and liabilities:
Accounts receivable	6,299	(2,431)
Prepaid expenses and other assets	(621)	(568)
Accounts payable	(514)	1,105
Accrued expenses and other current liabilities	(510)	(702)
Deferred revenue	(1,049)	134
Net cash provided by (used in) operating activities	7,691	(837)
Cash flows from investing activities:
Purchase of property and equipment	(2,363)	(5,643)
Investment in intangible and other assets	(39)	(26)
Net cash used in investing activities	(2,402)	(5,669)
Cash flows from financing activities:
Proceeds from issuance of common stock upon secondary offering	11,247
Payments of offering costs	(445)
Proceeds from exercise of stock options	348	451
Proceeds from exercise of warrants	51	989
Proceeds from employee stock purchase plan	642	421
Net cash provided by financing activities	11,843	1,861
Increase (decrease) in cash, cash equivalents and restricted cash	17,132	(4,645)
Effect of exchange rate on cash and cash equivalents	22	(81)
Cash, cash equivalents and restricted cash at beginning of year	10,278	19,597
Cash, cash equivalents and restricted cash at end of period	$ 27,432	14,871
Supplemental cash flow disclosures:
Deferred offering costs included in other assets		$ 66

Organization and Description of

Organization and Description of Business	6 Months Ended
	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Description of Business	Note 1. Organization and Description of Business ShotSpotter, Inc. (the “Company”) provides precision-policing solutions for law enforcement to help deter gun violence and make cities, campuses and facilities safer. The company’s flagship product, ShotSpotter Flex, is the leading outdoor gunshot detection, location and forensic system trusted by more than 100 cities. ShotSpotter Missions uses machine learning-driven analysis to help strategically plan patrol missions and tactics for maximum crime deterrence. ShotSpotter Labs is the Company’s effort to support innovative uses of its technology to help protect wildlife and the environment. The Company offers its solutions on a SaaS-based subscription model to its customers. The Company’s principal executive offices are located in Newark, California. The Company has two wholly-owned subsidiaries, ShotSpotter (Pty) Ltd. formed in South Africa and ShotSpotter Colombia S.A.S. which was formed in Colombia in March 2019.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated financial statements include the results of the Company and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated during consolidation. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, stockholder’s equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2019 or any future period. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates including the valuation of accounts receivable, the lives of tangible and intangible assets, stock-based compensation expense, and accounting for revenue recognition and income taxes. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the Company’s financial position and results of operations. Concentrations of Risk Credit Risk – Financial instruments that potentially subject the Company to concentration of credit risk consisted primarily of cash and cash equivalents and accounts receivable from trade customers. The Company maintains its cash deposits at one domestic and two international financial institutions. The Company is exposed to credit risk in the event of default by a financial institution to the extent that cash and cash equivalents are in excess of the amount insured by the Federal Deposit Insurance Corporation. The Company generally places its cash and cash equivalents with high-credit quality financial institutions. To date, the Company has not experienced any losses on its cash and cash equivalents. Concentration of Accounts Receivable –As of June 30, 2019, one customer accounted for 24% of the Company’s accounts receivable. Fluctuations in accounts receivable result from timing of the Company’s execution of contracts and collection of related payments. As of December 31, 2018, one customer accounted for 77% of the Company’s accounts receivable Concentration of Revenues –For the three months ended June 30, 2019, two customers accounted for 20% and 14% of the Company’s total revenues. For the three months ended June 30, 2018, two customers accounted for 24% and 14% of the Company’s total revenues. For the six months ended June 30, 2019, two customers accounted for 21% and 14% of the Company’s total revenues. For the six months ended June 30, 2018, two customers accounted for 22% and 16% of the Company’s total revenues. Concentration of Suppliers The Company relies on a limited number of suppliers and contract manufacturers. In particular, a single supplier is currently the sole manufacturer of the Company’s proprietary sensors. Accounting Pronouncements Recently Adopted In February 2016, the FASB issued ASU 2016-02, Leases At transition, lessees and lessors may elect to apply a package of practical expedients permitting entities not to reassess: (i) whether any expired or existing contracts are or contain leases; (ii) lease classification for any expired or existing leases and (iii) whether initial direct costs for any expired or existing leases qualify for capitalization under the amended guidance. These practical expedients must be elected as a package and consistently applied. The Company has elected to apply the package of practical expedients upon adoption. The Company’s operating lease for its corporate headquarters office is impacted by the new standard and upon adoption, the Company recognized a right-of-use asset of $0.9 million and related lease liabilities totaling $0.9 million. See Note 11, Leases. In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815)

Revenue Related Disclosures

Revenue Related Disclosures	6 Months Ended
	Jun. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue Related Disclosures	Note 3. Revenue Related Disclosures As of December 31, 2018, the Company had total short-term and long-term deferred revenue of $24.2 million. During the three months ended June 30, 2019, the Company recognized $9.2 million in revenue from the beginning deferred revenue balance and $1.0 million from new billings, and added $8.8 million to total short-term and long-term deferred revenue from new billings. During the six months ended June 30, 2019, the Company recognized $15.7 million in revenue from the beginning deferred revenue balance and $4.0 million from new billings, and added $18.7 million to total short-term and long-term deferred revenue from new billings. As of January 1, 2018, Revenue from Contracts with Customers As of June 30, 2019, the Company has estimated remaining performance obligations for contractually committed revenues of $17.7 million, $25.2 million, $15.5 million, and $0.9 million that will be recognized during the remainder of the year ending December 31, 2019, and years ended December 31, 2020, 2021, and 2022 through 2024, respectively. The timing of revenue recognition includes estimates of go live dates for contracts not yet live. Contractually committed revenue includes deferred revenue as of June 30, 2019 and amounts under contract that will be invoiced after June 30, 2019. During the three months ended June 30, 2019, the Company recognized revenues of $9.9 million from customers in the United States, $0.4 million from customers in South Africa and the Bahamas. During the six months ended June 30, 2019, the Company recognized revenues of $19.2 million from customers in the United States, $0.7 million from customers in South Africa and the Bahamas. During the three months ended June 30, 2018, the Company recognized revenues of $8.7 million from customers in the United States and $0.2 million from a customer in South Africa. During the six months ended June 30, 2018, the Company recognized revenues of $15.3 million from customers in the United States and $0.5 million from a customer in South Africa. Accounts Receivable, net and Unbilled Revenue Accounts receivable, net consist of trade accounts receivables from the Company’s customers, net of allowance for doubtful accounts if deemed necessary. Accounts receivable are recorded as the invoiced amount. The Company does not require collateral or other security for accounts receivable. Unbilled revenue consists of revenue recognized in advance of invoicing the customer.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 4. Fair Value Measurements In October 2018, upon the acquisition of certain technology, referred to as HunchLab, from Azavea, Inc., the Company recognized a contingent consideration liability classified within Level III of the fair value hierarchy because some of the inputs used in its measurement were neither directly or indirectly observable. The Company estimates the fair value of the contingent consideration based on management’s estimates of (i) the probability of achieving the relevant revenue targets and (ii) the timing of achieving such targets. There were no material changes in fair value of contingent consideration for the three and six months ended June 30, 2019. Level III balances (in thousands): June 30, December 31, 2019 2018 Fair value of contingent consideration $ 750 $ 750

Details of Certain Condensed Co

Details of Certain Condensed Consolidated Balance Sheet Accounts	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Details of Certain Condensed Consolidated Balance Sheet Accounts	Note 5. Details of Certain Condensed Consolidated Balance Sheet Accounts Prepaid expenses and other current assets (in thousands): June 30, December 31, 2019 2018 Prepaid expenses $ 1,458 $ 832 Deferred commissions 677 629 Other 67 66 $ 2,202 $ 1,527 Other assets (in thousands): June 30, December 31, 2019 2018 Deferred commissions $ 1,506 $ 1,560 Other 90 362 $ 1,596 $ 1,922 Accrued expenses and other current liabilities (in thousands): June 30, December 31, 2019 2018 Personnel-related accruals $ 2,180 $ 2,603 Royalties payable 93 130 Professional fees 222 396 Sales/ use tax payable 216 273 Contingent consideration 750 750 Operating lease liability 289 — Deferred rent — 24 Other 459 251 $ 4,209 $ 4,427 Other liabilities (in thousands): June 30, December 31, 2019 2018 Operating lease liability $ 464 $ — Deferred rent — 71 Other 3 5 $ 467 $ 76

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Note 6. Related Party Transactions During the six months ended June 30, 2019, the Company recognized $0.3 million in revenues from ShotSpotter Labs projects with charitable organizations that have received donations from one of the Company’s directors and from a significant shareholder of the Company.

Capital Stock

Capital Stock	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Capital Stock	Note 7. Capital Stock Common Stock The Company is authorized to issue 500,000,000 shares of common stock, with a par value of $0.005 and each outstanding share of common stock is entitled to one vote. As of June 30, 2019, there were 11,476,685 shares of common stock issued and outstanding. As of December 31, 2018, there were 10,864,722 shares of common stock issued and outstanding. Preferred Stock The Company is authorized to issue 20,000,000 shares of preferred stock, with a par value of $0.005. As of June 30, 2019, there were no shares of preferred stock issued and outstanding.

Net Income (Loss) per Share

Net Income (Loss) per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Income (Loss) per Share	Note 8. Net Income (Loss) per Share The computation of basic net income (loss) per share is based on the weighted-average number of common stock outstanding during each period. The computation of diluted net income (loss) per share is based on the weighted-average number of shares outstanding during the period plus, when their effect is dilutive, incremental shares consisting of shares subject to stock options, restricted stock units, ESPP shares and warrants. The following table summarizes the computation of basic and diluted net income (loss) per share (in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: Net income (loss) $ 387 $ (369 ) $ 25 $ (1,586 ) Denominator: Weighted-average shares outstanding, basic 11,365,472 10,589,038 11,186,371 10,329,874 Dilutive effect of common stock equivalents 608,004 — 670,975 — Weighted-average shares outstanding, diluted 11,973,476 10,589,038 11,857,346 10,329,874 Net income (loss) per share, basic $ 0.03 $ (0.03 ) $ 0.00 $ (0.15 ) Net income (loss) per share, diluted $ 0.03 $ (0.03 ) $ 0.00 $ (0.15 )

Common Stock Warrants

Common Stock Warrants	6 Months Ended
	Jun. 30, 2019
Warrants And Rights Note Disclosure [Abstract]
Common Stock Warrants	Note 9. Common Stock Warrants As of June 30, 2019, the Company had the following common stock warrants issued and outstanding (in thousands, except share and per share data): Warrant Class Shares Issuance Date Price per Share Expiration Date Common stock warrant 628 July 2012 $ 5.8667 July 2019 Common stock warrant 15,616 August 2012 $ 5.8667 August 2019 Common stock warrant 50,716 February 2014 $ 0.1700 February 2021 Common stock warrant (1) 84,000 June 2017 $ 13.2000 June 2020 150,960 (1 ) This warrant was issued to the Company’s lead underwriter in connection with the Company’s initial public offering.

Equity Incentive Plans

Equity Incentive Plans	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans	Note 10. Equity Incentive Plans 2017 Equity Incentive Plan In May 2017, the Board and the Company’s stockholders approved the 2017 Equity Incentive Plan (the “2017 Plan”), which became effective in connection with the IPO. The 2017 Plan provides for the issuance of stock options, restricted stock units and other awards to employees, directors and consultants of the Company. A total of 2,413,659 shares of the Company’s common stock were initially reserved for issuance under the 2017 Plan, which is the sum of (1) 900,000 shares, (2) the number of shares reserved for issuance under the 2005 Plan at the time the 2017 Plan became effective and (3) shares subject to stock options or other stock awards under the 2005 Plan that would have otherwise been returned to the 2005 Plan (up to a maximum of 1,314,752 shares). Under an “evergreen” provision, the number of shares of common stock reserved for issuance under the 2017 Plan will automatically increase on January 1 of each year, beginning on January 1, 2018 and ending on and including January 1, 2027, by of 5% of the total number of shares of our capital stock outstanding on December 31 of the preceding calendar year or a lesser number of shares determined by our Board of Directors. In accordance with the evergreen provision, the number of shares of common stock reserved for issuance under our 2017 Plan was automatically increased on January 1, 2019 by 543,236 shares, which was equal to 5% of the total number of shares of capital stock outstanding on December 31, 2018. 2005 Stock Plan In February 2005, the Company adopted the 2005 Stock Plan, as amended in January 2010 and November 2012 (the “2005 Plan”). Under the 2005 Plan provisions, the Company was authorized to grant incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock units, and shares of restricted stock. Following the effectiveness of the 2017 Plan in connection with the IPO, no further grants were made under the 2005 Plan. A summary of option activities under the 2005 Plan and 2017 Plan during the six months ended June 30, 2019 is as follows: Number of Options Outstanding Weighted Average Exercise Price Outstanding as of December 31, 2018 820,186 $ 8.44 Granted 79,868 $ 44.84 Exercised (243,368 ) $ 1.43 Canceled (12,082 ) $ 13.18 Outstanding as of June 30, 2019 644,604 $ 15.51 During the six months ended June 30, 2019, the Company granted executive management restricted stock unit (“RSU”) awards totaling 39,597 shares of common stock, with quarterly vesting over the next four years. The weighted average fair value of $44.95 per unit was calculated using the closing stock price on the grant date. During the six months ended June 30, 2019, the Company granted certain executive management RSU awards, subject to certain financial milestones, totaling 8,031 shares of common stock, with vesting terms 100% upon the first anniversary, if the Compensation Committee of the Board of Directors of the Company believes that the associated financial milestones were met. The weighted average fair value of $43.58 per unit was calculated using the closing stock price on the grant date. During the six months ended June 30, 2019, the Company granted directors RSU awards totaling 14,755 shares of common stock in accordance with the Company’s non-employee director compensation policy. The weighted average fair value of $41.79 per unit was calculated using the closing stock price on the grant date. The number of shares available for grant under the 2017 Plan was 1,669,522 as of June 30, 2019. 2017 Employee Stock Purchase Plan In May 2017, the Board and the Company’s stockholders adopted the 2017 Employee Stock Purchase Plan (“2017 ESPP”), which became effective in connection with the Company’s IPO. The 2017 ESPP allows eligible employees to purchase shares of the Company’s common stock in an offering at a discount of the then-current trading price, up to the lesser of (1) 85% of the fair market value of the common stock on the first day of the IPO or (2) 85% of the fair market value of the common stock on the purchase date. The 2017 ESPP permits the maximum discounted purchase price permitted under U.S. tax rules, including a “lookback.” The 2017 ESPP initial offering period ran from June 2017 to June 2019, and contained four six-month purchase periods. Beginning in June 2019, each offering period will have one purchase period lasting approximately six months. An employee’s purchase rights terminate immediately upon termination of employment or other withdrawal from the 2017 ESPP. No participant will have the right to purchase shares of common stock in an amount that has a fair market value of more than $25,000 determined as of the first day of the applicable purchase period, for each calendar year. There are 200,000 shares of common stock reserved for issuance under the 2017 ESPP. In addition, the 2017 ESPP contains an “evergreen” provision which provides for an automatic annual share increase on January 1 of each year, in an amount equal to the lesser of (1) 2% of the total number of shares of common stock outstanding on December 31 st The Company accounts for employee stock purchases made under its 2017 ESPP using the estimate grant date fair value of accounting in accordance with ASC 718, Stock Compensation There were 53,508 shares issued under the 2017 ESPP during the six months ended June 30, 2019. Total stock-based compensation expense associated with the 2005 Plan, 2017 Plan and 2017 ESPP is recorded in the condensed consolidated statements of operations and was allocated as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Cost of revenues $ 214 $ 75 $ 347 $ 132 Sales and marketing 273 199 539 265 Research and development 103 68 190 108 General and administrative 315 306 583 570 Total $ 905 $ 648 $ 1,659 $ 1,075

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Lessee Disclosure [Abstract]
Leases	Note 11. Leases Operating Lease The Company leases its principal executive offices in Newark, California, under a non-cancelable operating lease which expires in October 2021. This lease does not have significant rent escalation holidays, concessions, leasehold improvement incentives, or other build-out clauses. Further, the lease does not contain contingent rent provisions or renewal options. Our lease includes both lease (e.g., fixed payments including rent, taxes, and insurance costs) and non-lease components (e.g., common-area or other maintenance costs) which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases. Upon adoption of ASC 842 on January 1, 2019, the Company recognized an operating lease right-of-use asset of $0.9 million and a corresponding lease lability of $0.9 million, using a discount rate of 6% which reflects the Company’s incremental borrowing rate for a similar asset and similar term as of the date of adoption. The operating lease cost recognized for the three and six months ended June 30, 2019 was $0.1 million and $0.2 million, respectively. Rent expense recognized for the three and six months ended June 30, 2018 was $0.1 million and $0.2 million, respectively. Supplemental information related to the operating lease as follows (in thousands): As of June 30, 2019 Assets Operating lease right-of-use asset $ 697 Liabilities Lease liability (short-term) (presented within Accrued expenses and other current liabilities) $ 289 Lease liability (long-term) (presented within Other liabilities) 464 Total operating lease liability $ 753 Six months ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities (presented within Operating cash flows) $ 173 Maturities of the lease liability at June 30, 2019 are as follows (in thousands): 2019 (remainder of year) $ 146 2020 357 2021 304 Total lease payments, undiscounted 807 Less: imputed interest (54 ) Total $ 753 The Company does not have any finance leases. The following table is shown for comparative purposes only. The future minimum lease payments under the non-cancelable lease at December 31, 2018 were as follows (in thousands): 2019 $ 352 2020 357 2021 304 Total $ 1,013

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 12. Commitments and Contingencies The Company has non-cancelable data center arrangements which original term exceeds one year. The following is a schedule of future minimum payments under the non-cancelable data center arrangements at June 30, 2019 (in thousands): Data Center Arrangements 2019 (remainder of year) $ 113 2020 76 Total $ 189 Contingencies On August 28, 2018, Silvon S. Simmons (the "Plaintiff") amended a complaint against the City of Rochester, New York and various city employees, filed in the United States District Court, Western District of New York, to add the Company and employees as a defendant. The amended complaint alleges conspiracy to violate plaintiff's civil rights, denial of the right to a fair trial, and malicious prosecution. The Plaintiff claims that ShotSpotter colluded with the City of Rochester to fabricate and create gunshot alert evidence to secure Plaintiff's conviction. On the basis of the allegations, the Plaintiff has petitioned for compensatory and punitive damages and other costs and expenses, including attorney's fees. The Company believes that the Plaintiff's claims are without merit and are disputing them vigorously. The Company may become subject to legal proceedings, as well as demands and claims that arise in the normal course of business. Such claims, even if not meritorious, could result in the expenditure of significant financial and management resources. The Company makes a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed and adjusted to include the impacts of negotiations, estimated settlements, legal rulings, advice of legal counsel, and other information and events pertaining to a particular matter. An unfavorable outcome on any litigation matters could require payment of substantial damages, or, in connection with any intellectual property infringement claims, could require the Company to pay ongoing royalty payments or could prevent the Company from selling certain of our products. As a result, a settlement of, or an unfavorable outcome on, any of the matters referenced above or other litigation matters could have a material adverse effect on the Company’s business, operating results, financial condition and cash flows.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated financial statements include the results of the Company and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated during consolidation. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, stockholder’s equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2019 or any future period.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its significant estimates including the valuation of accounts receivable, the lives of tangible and intangible assets, stock-based compensation expense, and accounting for revenue recognition and income taxes. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the Company’s financial position and results of operations.
Concentrations of Risk	Concentrations of Risk Credit Risk – Financial instruments that potentially subject the Company to concentration of credit risk consisted primarily of cash and cash equivalents and accounts receivable from trade customers. The Company maintains its cash deposits at one domestic and two international financial institutions. The Company is exposed to credit risk in the event of default by a financial institution to the extent that cash and cash equivalents are in excess of the amount insured by the Federal Deposit Insurance Corporation. The Company generally places its cash and cash equivalents with high-credit quality financial institutions. To date, the Company has not experienced any losses on its cash and cash equivalents. Concentration of Accounts Receivable –As of June 30, 2019, one customer accounted for 24% of the Company’s accounts receivable. Fluctuations in accounts receivable result from timing of the Company’s execution of contracts and collection of related payments. As of December 31, 2018, one customer accounted for 77% of the Company’s accounts receivable Concentration of Revenues –For the three months ended June 30, 2019, two customers accounted for 20% and 14% of the Company’s total revenues. For the three months ended June 30, 2018, two customers accounted for 24% and 14% of the Company’s total revenues. For the six months ended June 30, 2019, two customers accounted for 21% and 14% of the Company’s total revenues. For the six months ended June 30, 2018, two customers accounted for 22% and 16% of the Company’s total revenues. Concentration of Suppliers The Company relies on a limited number of suppliers and contract manufacturers. In particular, a single supplier is currently the sole manufacturer of the Company’s proprietary sensors.
Accounting Pronouncements Recently Adopted	Accounting Pronouncements Recently Adopted In February 2016, the FASB issued ASU 2016-02, Leases At transition, lessees and lessors may elect to apply a package of practical expedients permitting entities not to reassess: (i) whether any expired or existing contracts are or contain leases; (ii) lease classification for any expired or existing leases and (iii) whether initial direct costs for any expired or existing leases qualify for capitalization under the amended guidance. These practical expedients must be elected as a package and consistently applied. The Company has elected to apply the package of practical expedients upon adoption. The Company’s operating lease for its corporate headquarters office is impacted by the new standard and upon adoption, the Company recognized a right-of-use asset of $0.9 million and related lease liabilities totaling $0.9 million. See Note 11, Leases. In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), Derivatives and Hedging (Topic 815)
Employee Stock Purchase Plan	The Company accounts for employee stock purchases made under its 2017 ESPP using the estimate grant date fair value of accounting in accordance with ASC 718, Stock Compensation
Revenue Recognition	As of December 31, 2018, the Company had total short-term and long-term deferred revenue of $24.2 million. During the three months ended June 30, 2019, the Company recognized $9.2 million in revenue from the beginning deferred revenue balance and $1.0 million from new billings, and added $8.8 million to total short-term and long-term deferred revenue from new billings. During the six months ended June 30, 2019, the Company recognized $15.7 million in revenue from the beginning deferred revenue balance and $4.0 million from new billings, and added $18.7 million to total short-term and long-term deferred revenue from new billings. As of January 1, 2018, Revenue from Contracts with Customers As of June 30, 2019, the Company has estimated remaining performance obligations for contractually committed revenues of $17.7 million, $25.2 million, $15.5 million, and $0.9 million that will be recognized during the remainder of the year ending December 31, 2019, and years ended December 31, 2020, 2021, and 2022 through 2024, respectively. The timing of revenue recognition includes estimates of go live dates for contracts not yet live. Contractually committed revenue includes deferred revenue as of June 30, 2019 and amounts under contract that will be invoiced after June 30, 2019. During the three months ended June 30, 2019, the Company recognized revenues of $9.9 million from customers in the United States, $0.4 million from customers in South Africa and the Bahamas. During the six months ended June 30, 2019, the Company recognized revenues of $19.2 million from customers in the United States, $0.7 million from customers in South Africa and the Bahamas. During the three months ended June 30, 2018, the Company recognized revenues of $8.7 million from customers in the United States and $0.2 million from a customer in South Africa. During the six months ended June 30, 2018, the Company recognized revenues of $15.3 million from customers in the United States and $0.5 million from a customer in South Africa.
Accounts Receivable, net and Unbilled Revenue	Accounts Receivable, net and Unbilled Revenue Accounts receivable, net consist of trade accounts receivables from the Company’s customers, net of allowance for doubtful accounts if deemed necessary. Accounts receivable are recorded as the invoiced amount. The Company does not require collateral or other security for accounts receivable. Unbilled revenue consists of revenue recognized in advance of invoicing the customer.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements - Summary of Level III Balances	Level III balances (in thousands): June 30, December 31, 2019 2018 Fair value of contingent consideration $ 750 $ 750

Details of Certain Condensed _2

Details of Certain Condensed Consolidated Balance Sheet Accounts (Tables)	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets (in thousands): June 30, December 31, 2019 2018 Prepaid expenses $ 1,458 $ 832 Deferred commissions 677 629 Other 67 66 $ 2,202 $ 1,527
Schedule of Other Assets	Other assets (in thousands): June 30, December 31, 2019 2018 Deferred commissions $ 1,506 $ 1,560 Other 90 362 $ 1,596 $ 1,922
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities (in thousands): June 30, December 31, 2019 2018 Personnel-related accruals $ 2,180 $ 2,603 Royalties payable 93 130 Professional fees 222 396 Sales/ use tax payable 216 273 Contingent consideration 750 750 Operating lease liability 289 — Deferred rent — 24 Other 459 251 $ 4,209 $ 4,427
Schedule of Other Liabilities	Other liabilities (in thousands): June 30, December 31, 2019 2018 Operating lease liability $ 464 $ — Deferred rent — 71 Other 3 5 $ 467 $ 76

Net Income (Loss) per Share (Ta

Net Income (Loss) per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Net Income (Loss) per Share	The computation of basic net income (loss) per share is based on the weighted-average number of common stock outstanding during each period. The computation of diluted net income (loss) per share is based on the weighted-average number of shares outstanding during the period plus, when their effect is dilutive, incremental shares consisting of shares subject to stock options, restricted stock units, ESPP shares and warrants. The following table summarizes the computation of basic and diluted net income (loss) per share (in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: Net income (loss) $ 387 $ (369 ) $ 25 $ (1,586 ) Denominator: Weighted-average shares outstanding, basic 11,365,472 10,589,038 11,186,371 10,329,874 Dilutive effect of common stock equivalents 608,004 — 670,975 — Weighted-average shares outstanding, diluted 11,973,476 10,589,038 11,857,346 10,329,874 Net income (loss) per share, basic $ 0.03 $ (0.03 ) $ 0.00 $ (0.15 ) Net income (loss) per share, diluted $ 0.03 $ (0.03 ) $ 0.00 $ (0.15 )

Common Stock Warrants (Tables)

Common Stock Warrants (Tables)	6 Months Ended
	Jun. 30, 2019
Warrants And Rights Note Disclosure [Abstract]
Schedule of Common Stock Warrants Issued and Outstanding	As of June 30, 2019, the Company had the following common stock warrants issued and outstanding (in thousands, except share and per share data): Warrant Class Shares Issuance Date Price per Share Expiration Date Common stock warrant 628 July 2012 $ 5.8667 July 2019 Common stock warrant 15,616 August 2012 $ 5.8667 August 2019 Common stock warrant 50,716 February 2014 $ 0.1700 February 2021 Common stock warrant (1) 84,000 June 2017 $ 13.2000 June 2020 150,960 (1 ) This warrant was issued to the Company’s lead underwriter in connection with the Company’s initial public offering.

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Stock Option Activity	A summary of option activities under the 2005 Plan and 2017 Plan during the six months ended June 30, 2019 is as follows: Number of Options Outstanding Weighted Average Exercise Price Outstanding as of December 31, 2018 820,186 $ 8.44 Granted 79,868 $ 44.84 Exercised (243,368 ) $ 1.43 Canceled (12,082 ) $ 13.18 Outstanding as of June 30, 2019 644,604 $ 15.51
Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations	Total stock-based compensation expense associated with the 2005 Plan, 2017 Plan and 2017 ESPP is recorded in the condensed consolidated statements of operations and was allocated as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Cost of revenues $ 214 $ 75 $ 347 $ 132 Sales and marketing 273 199 539 265 Research and development 103 68 190 108 General and administrative 315 306 583 570 Total $ 905 $ 648 $ 1,659 $ 1,075

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Lessee Disclosure [Abstract]
Summary of Supplemental Information Related to Operating Lease	Supplemental information related to the operating lease as follows (in thousands): As of June 30, 2019 Assets Operating lease right-of-use asset $ 697 Liabilities Lease liability (short-term) (presented within Accrued expenses and other current liabilities) $ 289 Lease liability (long-term) (presented within Other liabilities) 464 Total operating lease liability $ 753 Six months ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities (presented within Operating cash flows) $ 173
Summary of Maturity of Operating Lease Liabilities	Maturities of the lease liability at June 30, 2019 are as follows (in thousands): 2019 (remainder of year) $ 146 2020 357 2021 304 Total lease payments, undiscounted 807 Less: imputed interest (54 ) Total $ 753
Schedule of Future Minimum Lease Payments Under Non-Cancelable Lease	The following table is shown for comparative purposes only. The future minimum lease payments under the non-cancelable lease at December 31, 2018 were as follows (in thousands): 2019 $ 352 2020 357 2021 304 Total $ 1,013

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Payments Under Non-cancelable Data Center Arrangements	The following is a schedule of future minimum payments under the non-cancelable data center arrangements at June 30, 2019 (in thousands): Data Center Arrangements 2019 (remainder of year) $ 113 2020 76 Total $ 189

Organization and Description _2

Organization and Description of Business - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019CitySubsidiary
ShotSpotter (Pty) Ltd | South Africa and Columbia
Business And Nature Of Operations [Line Items]
Number of subsidiary | Subsidiary	2
Minimum
Business And Nature Of Operations [Line Items]
Number of cities in which entity operates | City	100

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019USD ($)Customer	Jun. 30, 2018Customer	Jun. 30, 2019USD ($)Customer	Jun. 30, 2018Customer	Dec. 31, 2018Customer	Jan. 01, 2019USD ($)
Accounting Policies [Line Items]
Operating lease right-of-use asset | $	$ 697		$ 697			$ 900
Operating lease liability | $	$ 753		$ 753			$ 900
Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Number of customers | Customer			1		1
Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Number of customers | Customer	2	2	2	2
Customer One | Customer Concentration Risk | Accounts Receivable
Accounting Policies [Line Items]
Concentration risk percentage			24.00%		77.00%
Customer One | Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Concentration risk percentage	20.00%	24.00%	21.00%	22.00%
Customer Two | Customer Concentration Risk | Revenues
Accounting Policies [Line Items]
Concentration risk percentage	14.00%	14.00%	14.00%	16.00%

Revenue Related Disclosures - A

Revenue Related Disclosures - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Jan. 01, 2018
Disaggregation Of Revenue [Line Items]
Deferred revenue		$ 18.1		$ 18.1
Deferred revenue added from new billings	$ 8.8	8.1	$ 18.7	15.8
United States
Disaggregation Of Revenue [Line Items]
Revenues	9.9	8.7	19.2	15.3
South Africa
Disaggregation Of Revenue [Line Items]
Revenues	0.4	0.2	0.7	0.5
Bahamas
Disaggregation Of Revenue [Line Items]
Revenues	0.4		0.7
Adoption of Topic 606
Disaggregation Of Revenue [Line Items]
Deferred revenue					$ 24.2	$ 17.3
Recognition from Beginning Deferred Revenue Balance
Disaggregation Of Revenue [Line Items]
Deferred revenue recognized	9.2	6.4	15.7	11.7
Recognition from New Billings of Deferred Revenue
Disaggregation Of Revenue [Line Items]
Deferred revenue recognized	$ 1	$ 2.3	$ 4	$ 3.9

Revenue Related Disclosures - E

Revenue Related Disclosures - Estimated Remaining Performance Obligations - Additional Information (Details) $ in Millions	Jun. 30, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 17.7
Estimated remaining performance obligations for contractually committed revenues recognition period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 25.2
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 15.5
Estimated remaining performance obligations for contractually committed revenues recognition period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining performance obligations for contractually committed revenues	$ 0.9
Estimated remaining performance obligations for contractually committed revenues recognition period	3 years

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - HunchLab - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Oct. 03, 2018	Jun. 30, 2019	Jun. 30, 2019
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Business acquisition date	Oct. 31, 2018
Change in fair value of contingent consideration		$ 0	$ 0

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Level III Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Level 3
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value of contingent consideration	$ 750	$ 750

Details of Certain Condensed _3

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]
Prepaid expenses	$ 1,458	$ 832
Deferred commissions	677	629
Other	67	66
Total	$ 2,202	$ 1,527

Details of Certain Condensed _4

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Assets Noncurrent Disclosure [Abstract]
Deferred commissions	$ 1,506	$ 1,560
Other	90	362
Total other assets	$ 1,596	$ 1,922

Details of Certain Condensed _5

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrued Expenses And Other Current Liabilities [Abstract]
Personnel-related accruals	$ 2,180	$ 2,603
Royalties payable	93	130
Professional fees	222	396
Sales/ use tax payable	216	273
Contingent consideration	750	750
Operating lease liability	289
Deferred rent		24
Other	459	251
Accrued expenses and other current liabilities	$ 4,209	$ 4,427

Details of Certain Condensed _6

Details of Certain Condensed Consolidated Balance Sheet Accounts - Schedule of Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Liabilities Noncurrent [Abstract]
Operating lease liability	$ 464
Deferred rent		$ 71
Other	3	5
Other liabilities, noncurrent	$ 467	$ 76

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
ShotSpotter Labs
Related Party Transaction [Line Items]
Revenue from related parties	$ 0.3

Capital Stock - Additional Info

Capital Stock - Additional Information (Details) - $ / shares	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Features Of Convertible Preferred Stock [Abstract]
Common stock, shares authorized	500,000,000
Common stock, par value	$ 0.005
Common stock, voting rights	each outstanding share of common stock is entitled to one vote
Common stock, shares issued	11,476,685	10,864,722
Common stock, shares outstanding	11,476,685	10,864,722
Preferred stock, shares authorized	20,000,000
Preferred stock, par value	$ 0.005
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0

Net Income (Loss) per Share - S

Net Income (Loss) per Share - Summary of Computation of Basic and Diluted Ne Income (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income (loss)	$ 387	$ (362)	$ (369)	$ (1,217)	$ 25	$ (1,586)
Denominator:
Weighted-average shares outstanding, basic	11,365,472		10,589,038		11,186,371	10,329,874
Dilutive effect of common stock equivalents	608,004				670,975
Weighted-average shares outstanding, diluted	11,973,476		10,589,038		11,857,346	10,329,874
Net income (loss) per share, basic	$ 0.03		$ (0.03)		$ 0	$ (0.15)
Net income (loss) per share, diluted	$ 0.03		$ (0.03)		$ 0	$ (0.15)

Common Stock Warrants - Schedul

Common Stock Warrants - Schedule of Common Stock Warrants Issued and Outstanding (Details)	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Class Of Warrant Or Right [Line Items]
Shares of warrants issued and outstanding	150,960
The July 2012 Common stock warrant
Class Of Warrant Or Right [Line Items]
Shares of warrants issued and outstanding	628
Issuance Date	2012-07
Price per Share | $ / shares	$ 5.8667
Expiration Date	2019-07
The August 2012 Common stock warrant
Class Of Warrant Or Right [Line Items]
Shares of warrants issued and outstanding	15,616
Issuance Date	2012-08
Price per Share | $ / shares	$ 5.8667
Expiration Date	2019-08
The February 2014 Common stock warrant
Class Of Warrant Or Right [Line Items]
Shares of warrants issued and outstanding	50,716
Issuance Date	2014-02
Price per Share | $ / shares	$ 0.1700
Expiration Date	2021-02
The June 2017 Common stock warrant
Class Of Warrant Or Right [Line Items]
Shares of warrants issued and outstanding	84,000	[1]
Issuance Date	2017-06	[1]
Price per Share | $ / shares	$ 13.2000	[1]
Expiration Date	2020-06	[1]
[1]	This warrant was issued to the Company’s lead underwriter in connection with the Company’s initial public offering.

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) - USD ($)	Jan. 01, 2019	May 31, 2017	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock Unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Units, Granted			39,597
Vesting period			4 years
Grant Date Fair Value, Granted			$ 44.95
Restricted Stock Unit | Subject to Certain Financial Milestones
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Units, Granted			8,031
Grant Date Fair Value, Granted			$ 43.58
Granted restricted stock units of common stock, vesting percentage			100.00%
Restricted Stock Unit | Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Units, Granted			14,755
Grant Date Fair Value, Granted			$ 41.79
2017 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance		2,413,659
Number of shares available for future grant		900,000	1,669,522
Shares of common stock reserved for issuance, automatic annual increase initiation date		Jan. 1, 2018
Shares of common stock reserved for issuance, automatic annual increase end date		Jan. 1, 2027
Percentage of number of shares of common stock outstanding				5.00%	5.00%
Increase in common stock reserved for issuance	543,236
2017 Equity Incentive Plan | Shares under 2005 Plan that would have otherwise been returned to 2005 Plan | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance		1,314,752
2017 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance			200,000
Percentage of number of shares of common stock outstanding				2.00%
Increase in common stock reserved for issuance	150,000
Percentage of fair market value of common stock on purchase date		85.00%
Percentage of fair market value of common stock on purchase date of the first day of IPO		85.00%
Purchase of common stock under ESPP, Description			The 2017 ESPP allows eligible employees to purchase shares of the Company’s common stock in an offering at a discount of the then-current trading price, up to the lesser of (1) 85% of the fair market value of the common stock on the first day of the IPO or (2) 85% of the fair market value of the common stock on the purchase date. The 2017 ESPP permits the maximum discounted purchase price permitted under U.S. tax rules, including a “lookback.”
Initial offering period			June 2017 to June 2019
Maximum amount of fair value of common stock by participant			$ 25,000
Periodic increment of common stock reserved for future issuance			150,000
Shares issued under ESPP			53,508

Equity Incentive Plans - Schedu

Equity Incentive Plans - Schedule of Stock Option Activity (Details) - 2005 Plan and 2017 Plan	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding, Beginning Balance | shares	820,186
Number of Options Outstanding, Granted | shares	79,868
Number of Options Outstanding, Exercised | shares	(243,368)
Number of Options Outstanding, Canceled | shares	(12,082)
Number of Options Outstanding, Ending Balance | shares	644,604
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 8.44
Weighted Average Exercise Price, Granted | $ / shares	44.84
Weighted Average Exercise Price, Exercised | $ / shares	1.43
Weighted Average Exercise Price, Canceled | $ / shares	13.18
Weighted Average Exercise Price, Ending Balance | $ / shares	$ 15.51

Equity Incentive Plans - Sche_2

Equity Incentive Plans - Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 905	$ 648	$ 1,659	$ 1,075
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	214	75	347	132
Sale and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	273	199	539	265
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	103	68	190	108
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 315	$ 306	$ 583	$ 570

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Lessee Disclosure [Abstract]
Operating lease, description		The Company leases its principal executive offices in Newark, California, under a non-cancelable operating lease which expires in October 2021.
Operating lease, expiraton period		2021-10
Operating lease right-of-use asset	$ 697	$ 697	$ 900
Operating lease liability	$ 753	$ 753	$ 900
Operating lease, discount rate	6.00%	6.00%
Operating lease cost recognized	$ 200	$ 100
Rent expense	$ 200	$ 100

Leases - Summary of Supplementa

Leases - Summary of Supplemental Information Related to Operating Lease (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019
Assets And Liabilities Lessee [Abstract]
Operating lease right-of-use asset	$ 697	$ 900
Lease liability (short-term) (presented within Accrued expenses and other current liabilities)	$ 289
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities
Lease liability (long-term) (presented within Other liabilities)	$ 464
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liability	$ 753	$ 900
Cash paid for amounts included in the measurement of lease liabilities (presented within Operating cash flows)	$ 173

Leases - Summary of Maturities

Leases - Summary of Maturities of Lease Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating Lease Liabilities Payments Due [Abstract]
2019 (remainder of year)	$ 146
2020	357
2021	304
Total lease payments, undiscounted	807
Less: imputed interest	(54)
Operating lease liability	$ 753	$ 900

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments Under Non-Cancelable Lease (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2019	$ 352
2020	357
2021	304
Total	$ 1,013

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Future Minimum Payments Under Non-cancelable Data Center Arrangements (Details) $ in Thousands	Jun. 30, 2019USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2019 (remainder of year)	$ 113
2020	76
Total	$ 189